<template>
  <div class="upload-file" style="width: 100%;">
    <!-- 文件列表 -->
    <transition-group class="upload-file-list el-upload-list el-upload-list--text" name="el-fade-in-linear" tag="ul">
      <li :key="file.path" class="el-upload-list__item ele-upload-list__item-content" v-for="(file, index) in fileList">
        <span class="el-icon-document" @click="downLoadFile(file)"> {{ file.uploadFileName }} </span>
        <div class="ele-upload-list__item-content-action">
          <el-link :underline="false" @click="handleDelete(index)" type="danger"><svg-icon class-name="upload-icon"
              icon-class="remove" />删除</el-link>
        </div>
      </li>
    </transition-group>
    <el-upload multiple="multiple" :before-upload="handleBeforeUpload" :http-request="uploadFile" :limit="limit"
      :on-error="handleUploadError" :on-exceed="handleExceed" :show-file-list="false" class="upload-file-uploader"
      ref="fileUpload" :accept="accept">
      <!-- 上传按钮 -->
      <el-button class="upload-button" type='primary' size="mini">上传附件</el-button>
      <!-- 上传提示 -->
      <!-- <div class="upload__tip" slot="tip" v-if="showTip">
                支持 {{ fileType.join("/") }} 格式，每个文件大小不超过{{ fileSize }}MB
                <p style="color: red">不得上传国家秘密、“内部”“内部资料”等工作秘密材料。</p>
            </div> -->
    </el-upload>

  </div>
</template>

<script>
import { defineComponent, onMounted, reactive, ref, toRefs } from 'vue'
import { getUploadToken, uploadFile, getDownloadtoken, downloadFile } from "@/api/uploadapi"
import { CMSApiUpload, CMSApiDownloadFile } from "@/api/api"
import { ElMessage } from 'element-plus'
import { saveAs } from 'file-saver'

export default defineComponent({
  name: '',
  props: {
    // 值
    value: [String, Object, Array],
    // 数量限制
    limit: {
      type: Number,
      default: 3,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 10,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ['gif', 'jpg', 'jpeg', 'png', 'bmp', 'txt', 'doc', 'xls', 'pdf', 'rar', 'docx', 'xlsx', 'wps', 'zip'],
    },
    accept:{},
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true
    }
  },
  setup (props, { emit }) {
    const dataMap = reactive({
      baseUrl: "",
      fileList: props.value || [],
    })
    const methodsMap = reactive({
      getFileNameByFile (file) {
        let arr = file.split("_")
        arr.splice(0, 1)
        return arr.join("")
      },
      // 重写上传程序
      async uploadFile (params) {
        var { file } = params
        let res2 = await CMSApiUpload({
          file: file,
        })
        methodsMap.handleUploadSuccess(res2)
      },
      // 上传前校检格式和大小
      async handleBeforeUpload (file) {
        if (dataMap.fileList.length >= props.limit)
        {
          ElMessage.error(`上传文件数量不能超过 ${props.limit} 个!`)
          return false
        }
        console.log('handleBeforeUpload', file)
        // 校检文件类型
        if (this.fileType)
        {
          const fileName = file.name.split('.')
          const fileExt = fileName[fileName.length - 1]
          const isTypeOk = this.fileType.indexOf(fileExt) >= 0
          if (!isTypeOk)
          {
            this.$modal.msgError(`文件格式不正确, 请上传${this.fileType.join("/")}格式文件!`)
            return false
          }
        }
        // 校检文件大小
        if (this.fileSize)
        {
          const isLt = file.size / 1024 / 1024 < this.fileSize
          if (!isLt)
          {
            this.$modal.msgError(`上传文件大小不能超过 ${this.fileSize} MB!`)
            return false
          }
        }
        console.log('res')
        return true
      },
      // 文件个数超出
      handleExceed () {
        ElMessage.error(`上传文件数量不能超过 ${props.limit} 个!`)
      },
      // 上传失败
      handleUploadError (err) {
        this.$modal.msgError("上传文件失败，请重试")
        this.$modal.closeLoading()
      },
      // 上传成功回调
      handleUploadSuccess (res, file) {
        if (res.code == 0)
        {
          dataMap.fileList.push(res.data)
          emit("update:value", dataMap.fileList)
        }
      },
      // 删除文件
      handleDelete (index) {
        dataMap.fileList.splice(index, 1)
        emit("update:value", dataMap.fileList)
      },
      // 获取文件名称
      getFileName (name) {
        // 如果是url那么取最后的名字 如果不是直接返回
        if (name.lastIndexOf("/") > -1)
        {
          return name.slice(name.lastIndexOf("/") + 1)
        } else
        {
          return name
        }
      },
      async downLoadFile (file) {
        CMSApiDownloadFile({
          fileBusType: 'Comm',
          fileNameId: file.id
        }).then(async ({ data }) => {
          const blob = new Blob([data])
          saveAs(blob, file.uploadFileName)
        })
      },
      // 对象转成指定字符串分隔
      listToString (list, separator) {
        let strs = ""
        separator = separator || ","
        for (let i in list)
        {
          strs += list[i].path + separator
        }
        return strs != '' ? strs.substr(0, strs.length - 1) : ''
      }
    })
    onMounted(() => {
    })
    return {
      ...toRefs(dataMap),
      ...toRefs(methodsMap),
    }
  },
})
</script>
<style scoped lang="scss">
.upload-button {}

.upload-icon {
  margin-right: 8px;
  width: 14px;
  height: 14px;
}

.upload__tip {
  font-weight: 400;
  font-size: 12px;
  color: #4E5969;
  line-height: 20px;
  margin-top: 8px;
}

.el-icon-document {
  cursor: pointer;
}

.upload-file-uploader {
  margin-bottom: 5px;
}

.upload-file-list .el-upload-list__item {
  padding-left: 8px;
  background-color: white;
  width: 300px;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
}

.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
  width: 100%;
}

.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}
</style>
